inventory.py

stuff = {'rope': 1, 'torch': 6, 'gold coin': 42, 'dagger': 1, 'arrow': 12}
inv = {'gold coin': 42, 'rope': 1}
dragonLoot = ['gold coin', 'dagger', 'gold coin',
              'gold coin', 'ruby']


def addToInventory(inventory, addedItems):
    for item in addedItems:
        if item in inventory:
            inventory[item] += 1
        else:
            inventory[item] = 1
    return inventory


def displayInventory(inventory):
    print("Inventory:")
    item_total = 0
    for k, v in inventory.items():
        if v != 1:
            k += 's'
        print(v, k)
        item_total += v
    print("Total number of items: " + str(item_total))

inv = addToInventory(inv, dragonLoot)
displayInventory(inv)
# displayInventory(stuff)

if you want, you can just use scrap the code for addToInventory and do this:
def addToInventory(inventory, addedItems): print("adding: " + str(addedItems)) inventory.update(addedItems) return inventory